Abstract
We present version 3.4 of the CalcHEP software package which is designed for
effective evaluation and simulation of high energy physics collider processes
at parton level.
The main features of CalcHEP are the computation of Feynman diagrams,
integration over multi-particle phase space and event simulation at parton
level. The principle attractive key-points along these lines are that it has:
a) an easy startup even for those who are not familiar with CalcHEP; b) a
friendly and convenient graphical user interface; c) the option for a user to
easily modify a model or introduce a new model by either using the graphical
interface or by using an external package with the possibility of cross
checking the results in different gauges; d) a batch interface which allows to
perform very complicated and tedious calculations connecting production and
decay modes for processes with many particles in the final state.
With this features set, CalcHEP can efficiently perform calculations with a
high level of automation from a theory in the form of a Lagrangian down to
phenomenology in the form of cross sections, parton level event simulation and
various kinematical distributions.
In this paper we report on the new features of CalcHEP 3.4 which improves the
power of our package to be an effective tool for the study of modern collider
phenomenology.
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